Abstract:
PURPOSE: A multimode apparatus capable of keeping providing a communication service and a communication method thereof are provided to enable a continuous communication service even when a base station is damaged. CONSTITUTION: A multimode apparatus comprises a radio frequency (RF) module and a processor (520) connected to the RF module. The processor, when being selected as an apparatus functioning as a relay because of a base station having a problem in a backhaul link, controls the multimode apparatus to set a first base station and a first relay link. The processor, when receiving a unlink request to terminate the first relay link from the first base station, controls the multimode apparatus to set a second base station and a second relay link or to configure and operate a private network or an independent network. [Reference numerals] (520) Processor; (540) Memory; (560) RF module
Abstract:
PURPOSE: A communication method of a base station and a terminal are provided to support communication between the base station and the terminal when the base station is not connected with an upper network by damage of a backbone network. CONSTITUTION: A base station transmits REQ(request) message to a terminal 1(S410). The terminal 1 transmits RSP(response) message(S420). The base station transmits the request message for communications setting request with the terminal 1 and the terminal 2 for communicating with the terminal 1(S430). The terminal 2 transmits the response message to the base station(S440). [Reference numerals] (AA) Back hole link; (BB) Local transmission
Abstract:
PURPOSE: A communication method of a base station and a communication method of a mobile terminal are provided to supply a communication service through an adjacent base station or a relay station in case a backhaul link of a base station is damaged. CONSTITUTION: A first base station(110) transmits information about a terminal(200) to a second base station(120)(S510). The first base station transmits information about transmitting the information to the second base station to the terminal(S530). The information includes context information. The first base station transmits a list of the second base station to the terminal. The list of the second base station is arranged in order of priority. [Reference numerals] (AA) Backhaul link; (BB, CC) Information transmission
Abstract:
PURPOSE: A cell configuration method using a multi-function terminal is provided to construct cells by enabling a terminal to conduct a role of a base station in a communication system. CONSTITUTION: A terminal(110) searches bands. The terminal determines states of the bands. In case the band is an idle state, the terminal transmits a downlink frame including preamble. Other terminals(111) located within one-hop from the terminal conducts a network entry process with the terminal. The terminal optimizes transmission power. The idle band is determined when RSSI(Received Signal Strength Indication) does not over threshold values.
Abstract:
PURPOSE: A multicast management method and apparatus thereof are provided to perform a group call based on multicast due to receiving traffic in a multicast mode. CONSTITUTION: A base station(410) generates CRC(Cyclic Redundancy Check) about a message including the resource allocation information of a multicast group(420). The multicast group includes a plurality of terminals. The base station masks the CRC by a CRC mask. The base station adds the masked CRC to the message. The base station transmits the message to the multicast group.
Abstract:
PURPOSE: A femto cell base-station apparatus and a self-configuring method thereof are provided to detect a neighbor macro cell and a femto cell environment without the control of an external control device or a macro cell base station. CONSTITUTION: A preamble extraction unit(420) extracts a first macro cell preamble from the signals of a femto cell and an adjacent macro cell, and a power allocation unit(430) sets the transmission power through the first macro cell preamble. A preamble selection unit(440) selects a second femto cell preamble from the first macro preamble. A header generating unit(550) generates a header of a femto cell control signal, and a resource allocation unit(560) allocates the resources for the transmission of the data from the femto cell.
Abstract:
A method performing resources reallocation and band request for reducing overhead in a radio access system are provided to reduce resource allocation overhead about a retransmission burst when synchronous HARQ operation by mingling synchronous HARQ(Hybrid Automatic Repeat reQuest) and asynchronous method HARQ. A terminal receives burst information in an initial frame transmitted from a base station(S100). The burst information comprises the length and assignment order of the downlink burst. The terminal determines whether to receive downlink burst(S110). The terminal determines the necessity of the uplink band on buffered information(S120). If it is necessary to have the uplink band, the terminal transmits one to the base station(S130).
Abstract:
A method for assigning resources in consideration of the power limit of a mobile station and transmitting signal is provided to allocate resource within the limit power of the mobile station and minimize the resources allocated in the frequency axis. A communications resource corresponding to a mobile station is allocated through a plurality of frames. The assignment information of the communications resource is transmitted to the mobile station. Transmission signal is received through the communications resource. The transmission signal includes at least two coded blocks channel-coded about one data. The assignment information of the communications resource includes the transfer period information of data. The communications resource is additionally allocated about the mobile station.
Abstract:
본 발명은 단순전력분석에 안전한 Left-to-Right 리코딩 기법과 통합된 스칼라 곱셈 방법에 관한 것으로, 타원곡선 암호시스템과 페어링을 기반하는 암호시스템에서 사용되는 스칼라 곱셈 방법에 있어서, r진법으로 표현된 n-digit 비밀키(k)의 최상위 digit부터 중복을 허용한 2개의 연속된 원소를 비교하여 L-digit 비밀키(k')가 생성되도록 리코딩하는 단계 및 상기 리코딩된 비밀키(k')를 이용하여 상기 비밀키(k)와 상기 타원곡선 상의 임의의 점 P에 스칼라 곱셈하여 스칼라 곱셈 결과값(Q)을 산출하는 단계로 구성되어, 스칼라 곱셈 알고리즘을 부채널 공격, 특히 단순전력분석 공격에 안전하도록 기수 r진법으로 표현된 비밀키의 표현을 부호화를 이용해 리코딩 단계와 스칼라 곱셈 단계를 동시에 수행할 수 있게 하여 메모리의 제약을 받는 유비쿼터스 컴퓨팅 환경에서 부채널 공격에 안전하면서 메모리의 사용을 최대한 줄일 수 있는 기술적인 해결 방법을 제시한다. 타원곡선, 페어링, 암호시스템, 부채널 공격, Left-to-Right 리코딩
Abstract:
본 발명은 효율적으로 스케줄링 및 트래픽 처리를 수행할 수 있는 초고속 휴대 인터넷 시스템의 트래픽 처리 시스템 및 그 방법에 관한 것이다. 초고속 휴대 인터넷 시스템의 트래픽 처리 시스템 및 그 방법은 기지국(AP)의 MAC 소프트웨어 모듈이 각 논리적 기능에 따라 다른 우선순위를 갖는 태스크로 구성하기 위해 프레임 동기에 따라 정확하게 동작해야 하는 스케줄링부, 상향 프레임 처리부 및 제어부에 높은 우선순위를 두고, 네트워크로부터 수신된 하향 패킷과 다수의 단말기로부터 수신된 상향 패킷을 처리하는 하향 패킷 처리부와 상향 패킷 처리부에 프로세서의 동작에 부하를 주지 않도록 낮은 우선순위를 갖도록 한다. 또한, 초고속 휴대 인터넷 시스템의 트래픽 처리 시스템 및 그 방법은 정확한 동작 시점이 요구되는 스케줄링부, 상향 프레임 처리부, 제어부에는 외부 클록 인터럽트에 따라 동작을 제어하고, 각 부는 쓰레드로 구동되어 셀 및 사용자 정보를 공유함으로써 각 프로세스간 통신 부하를 줄이도록 하여 실시간 트래픽 처리를 수행함과 동시에 고속의 패킷을 효율적으로 처리할 수 있도록 한다. 초고속 휴대 인터넷 시스템(HPI), MAC 소프트웨어 모듈, 태스크, 쓰레드, 클록 인터럽트